David Brent Nail (born May 18, 1979) is an American singer/songwriter and country music artist. In 2002, he debuted the single "Memphis" from an unreleased album for Mercury Records Nashville. Five ye
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68f82dae6dc1a43c1651cd75bb62478f0f00dd524a0930ef11d1b06eb273158e. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2b4b316b-f2c7-40ac-934d-a4c5df3f0497.json and https://artists.proofprofile.net/proofs/artist/2b4b316b-f2c7-40ac-934d-a4c5df3f0497.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcede568fead94bcd304c33d07575276c4fe394633d016eefb6b4b8c50ce04460. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USUM70853386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c35689f9ee7dae6a4a9ec8f049179adf22ece018fcf2ee5e8122ccef6719d35. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USUM71509781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c35689f9ee7dae6a4a9ec8f049179adf22ece018fcf2ee5e8122ccef6719d35. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USUM71509781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c35689f9ee7dae6a4a9ec8f049179adf22ece018fcf2ee5e8122ccef6719d35. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USUM71509781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf143aab42c6ba4fe9ce4d4f3991fdb810b0fb8baa1031f0ef466611691704114. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USUM71511955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c35689f9ee7dae6a4a9ec8f049179adf22ece018fcf2ee5e8122ccef6719d35. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USUM71509781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3dfd9ae78b6eef8a7b442902e8dc7808be4898663c1c8547c3ab511ad464b54. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USUM71604789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b0c33174d29cb94cc90a06416bb05e8a902926af2488c37e84c3cdb42b3cf98. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USUM71604772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x911abaf810381f9d0985d62ef05fc2a68871267c8918e39394c8206b49a9638f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USUM71604790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc260620e18684708538aa9253e931bbfbaa5392b6aeef76bba7d6128701275f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USUM71604773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9dd6eea04887d19ed897eeb9991a0e74c09b4785b7464119553f8da348edfd0. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USUM71604774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34384afd21065df83cbe7d812dda78d440f898ac8c5bd824dacf6a354adcaf53. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USUM71604791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x589ade525508c635e84f82034074e450ec6ad05dbdb13d2806166e2ba12433da. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USUM71604775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56a3933f187d7c709e1180f931807eda01ea7c06f4d79ab62bff386f0f8d4a14. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USUM71604788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c1e2bf6f561a3cbdada908586f427450cc79d50b001de0aeda8def84b8ee351. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USUM71604792.